NEC Electronics · 2081 · Question 29

Ra, Rb, and Rc are resistances connected in star at terminals A, B, and C. After transforming to delta, what is the resistance between B and C?

Star-Delta Transformation

ARc+Rb+Rc*Rb/Ra
BRc+Rb+Ra*Rb/Rc
CRa+Rb+Ra*Rc/Rb
DRc+Rb+Rc*Ra/Rb
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Ra, Rb, and Rc are resistances connected in star at terminals A, B, and C.… | NEC Electronics | License Prep